scholarly journals Estudio de la estabilidad en líneas avanzadas y variedades de arroz (Oryza sativa L.) usando dos metodologías.

2016 ◽  
Vol 5 ◽  
pp. 118 ◽  
Author(s):  
Guillermo Castañon
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Soil Type ◽  
Oryza Sativa L ◽  
New Variety ◽  
Days To Heading ◽  
Rainfed Conditions ◽  
Rice Genotypes ◽  
The Stability ◽  
Dry Farming

Four loealities in the State of Campeche, Mexico were used during the Spring-Summer of 1982 and 1983 to conduct trial in orferto study the stability of rice genotypes. The studied variables were: days to heading (DH), plant height (PH) and grain yield (GY). Two methodologies (Eberhart and Russell, 1966 and Wricke, 1965) were compared to determine which was most effective in detecting the stability ofthe tested genotypes. The results show that these tested genotypes were different or were environmentaly affected at each locality. The PH mea n was slightly shorter for dry farming cultivars. This shortage was largely due to thc effect ofthe Edzna environment which was drier because of the soil type. Among the assayed genotypes, there is a potential for GY in two of the advanced lines (IR2055-466-6-6 and IR2055-481-2-l Cu). One of these could be released as a new variety for rainfed conditions. The results show that either method can be used, giving the same response, although the Wricke's method is more easily interpreted that Eberhart and Russell.

scholarly journals Genetic Diversity of Selected Upland Rice Genotypes (Oryza sativa L.) for Grain Yield and Related Traits

2018 ◽  
Vol 22 (5) ◽  
pp. 1-9 ◽  
Author(s):  
Christian Anyaoha ◽  
Felix Adegbehingbe ◽  
Uyokei Uba ◽  
Bosede Popoola ◽  
Vernon Gracen ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Grain Yield ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Rice Genotypes

scholarly journals Screening of Rice (Oryza sativa L.) Genotypes at Reproductive Stage for their Tolerance to Salinity

2018 ◽  
Vol 16 (1) ◽  
pp. 65-77
Author(s):  
M M Islam ◽  
M H Faruqe ◽  
M S Rana ◽  
M Akter ◽  
M A Karim
Keyword(s):  
Oryza Sativa ◽  
Salt Tolerance ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Saline Water ◽  
Coastal Zones ◽  
Salt Tolerant ◽  
Randomized Design ◽  
Rice Genotypes ◽  
Four Levels

Soil salinity is one of the most devastating environmental stresses for rice production in the coastal areas of Bangladesh. Improvement in salt tolerance of rice is an important way for the economic utilization of coastal zones. An experiment was conducted at the vinyl house of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during December 2016 to April 2017 to determine the effects of different salinity levels on the yield and yield components of some rice (Oryza sativa L.) genotype sand finally, screening of rice genotypes for salt tolerance. The experiment containing four treatments was laid out in a complete randomized design with five replications. The treatments were four levels of saline water with electrical conductivities at control (0.3 dSm-1), 5, 10 and 15dSm-1. Based on screening at germination stage, relatively salt-tolerant eleven genotypes with two check varieties were used in this experiment. The study showed that increase in salinity level significantly decreased yield and yield contributing characters of rice. However, among the eleven, three genotypes (Chapali, Patnai 23 and Soloi) were considered as moderately salt tolerant at 15 dSm-1 on the basis of their yields and yield contributing characteristics such as plant height reduction, total tiller reduction, effective tiller reduction, reduction of fertile grains per panicle, grain yield and relative grain yield. Therefore, Chapali, Patnai 23 and Soloi might be recommended as moderately salt tolerant rice genotypes. The Agriculturists 2018; 16(1) 65-77

Assessment of molecular divergence using microsatellite markers linked to drought-yield QTLs of rice (Oryza sativa L.)

2020 ◽  
Vol 57 (2) ◽  
pp. 94-99
Author(s):  
ND Rathan ◽  
SK Singh ◽  
RK Singh ◽  
PR Vennela
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Polymorphic Marker ◽  
Polymorphic Markers ◽  
Rainfed Conditions ◽  
Transgressive Segregants ◽  
Rice Genotypes ◽  
Contemporary Study ◽  
Selection Of

The drought stress is the major limitation for the production and yield stability in the rice (Oryza sativa L.) growing areas particularly under rainfed conditions. The assessment of genetic diversity among the rice genotypes using molecular markers linked to drought-yield QTLs will help in the selection of divergent parents to produce superior recombinants and transgressive segregants to develop high yielding cultivars for drought conditions. So the current study was conducted to estimate the genetic diversity among the set of twenty four advanced drought tolerent rice genotypes and commercial checks using SSR markers linked to major drought-yield QTLs. A total of 31 alleles were detected by 13 polymorphic markers across 24 rice genotypes with a mean of 1.94 alleles per polymorphic marker. Among the polymorphic markers, 11 markers formed 2 alleles each, 2 markers have produced 3 alleles each. The PIC value observed in the contemporary study ranged from 0.239 to 0.499 with an average PIC value of 0.346. The dendrogram displayed a total five clusters on the basis of dissimilarity coefficient values, the cluster II had maximum ten genotypes followed by cluster IB-a with five genotypes and clusters IA-a, IA-b, IB-b with three genotypes each. IR 82475-110-2-2-1-2 and IR92937-178-2-2 (R-155) were found to be the most divergent genotypes.

scholarly journals Analysis of Yield Components and Aroma of Small Grain Aromatic Rice (Oryza sativa L.) in Bangladesh

2016 ◽  
Vol 13 (2) ◽  
pp. 17-24
Author(s):  
Parth Sarothi Saha ◽  
Mizan Ul Islam ◽  
Md. Sirajul Islam ◽  
Muhammad Abdus Salam
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Yield Components ◽  
Agricultural Research ◽  
Oryza Sativa L ◽  
Positive Contribution ◽  
Aromatic Rice ◽  
Agricultural Research And Development ◽  
Check Variety ◽  
Rice Genotypes

The study was conducted to evaluate the extent of variability among the small grain aromatic (SGA) rice (Oryza sativa L.) genotypes for yield and yield components. Twenty four popular SGA rice genotypes were evaluated for yield and yield contributing characters in BRAC Agricultural Research and Development Centre, Gazipur, Bangladesh. BRRI dhan34 was used as check variety. Highest grain yield per plant was observed in Chinikanai-1, which was followed by Kalijira PL-9, Kalijira PL-3 and Badshabhog. Chinikanai-1 had the highest number of grains per panicle. Correlation analysis revealed that the number of panicles per plant (r = 0.646) and number of grains per panicle (r = 0.525) had the positive contribution to grain yield. Based on sensory test, it was found that 18 genotypes were scented and six were lightly scented. After evaluation of yield components, four genotypes namely Chinikanai-1, Kalijira PL-9, Kalijira PL-3 and Badshabhog were selected as outstanding genotypes, which can be used as potential breeding materials for sub-tropical environment of Bangladesh.The Agriculturists 2015; 13(2) 17-24

scholarly journals Assessment of Genetic Variability and Correlation of Yield Components of Elite Rice Genotypes (Oryza sativa L.)

2021 ◽  
Vol 24 (1) ◽  
pp. 21-29
Author(s):  
SK Debsharma ◽  
RF Disha ◽  
MME Ahmed ◽  
M Khatun ◽  
M Ibrahim ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Yield Components ◽  
Oryza Sativa L ◽  
Positive Contribution ◽  
Thousand Grain Weight ◽  
Rice Gene ◽  
Yield And Yield Components ◽  
Rice Genotypes ◽  
J 24

The study was conducted to evaluate the extent of variability among the elite rice (Oryza sativa L.) genotypes for yield and yield components. Sixteen elite rice genotypes were evaluated for yield and yield contributing characters in Bangladesh Rice Research Institute, Regional Station, Satkhira. Highest grain yield (t ha-1) was observed in BR(Bio)8333-BC5-2-16, which was followed by BR16, BRRI dhan28, BRRI dhan58 and BRRI dhan29. BR7671-37-2-2-37-3-P3 had the highest number of grains per panicle with minimum thousand grain weight. Correlation analysis revealed that the number of panicles per plant (0.301), days to 50% flowering (0.606) and grain yield per plant (0.393) had the significantly positive contribution to grain yield. After evaluation of yield components, four genotypes namely BR(Bio)8333-BC5-1-20, BR(Bio)8333-BC5-2-16, BR(Bio)8333- BC5-2-22 and BR(Bio)8333-BC5-3-10 were selected as outstanding genotypes, which can be used as potential breeding materials for variety development or in the crossing program to enrich the rice gene pool in Bangladesh. Bangladesh Rice J. 24 (1): 21-29, 2020

Efficacy of some insecticide modules against major insect pests and spider population of rice, Oryza sativa L.

ENTOMON ◽  
2018 ◽  
Vol 43 (4) ◽  
pp. 257-262
Author(s):  
Atanu Seni ◽  
Bhimasen Naik
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Untreated Control ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Gall Midge ◽  
Stem Borer ◽  
The Other ◽  
The Third ◽  
Treated Plot

Experiments were carried out to assess some insecticide modules against major insect pests of rice. Each module consists of a basal application of carbofuran 3G @ 1 kg a.i ha-1 at 20 DAT and Rynaxypyr 20 SC @ 30 g a.i ha-1 at 45 DAT except untreated control. All modules differ with each other only in third treatment which was applied in 65 DAT. The third treatment includes: Imidacloprid 17.8 SL @ 27 g a.i ha-1, Pymetrozine 50 WG @ 150 g a.i ha-1, Triflumezopyrim 106 SC @ 27 g a.i ha-1, Buprofezin 25 SC @ 250 g a.i ha-1; Glamore (Imidacloprid 40+Ethiprole 40% w/w) 80 WG @ 100 g a.i. ha-1, Thiacloprid 24 SC @ 60 g a.i ha-1, Azadirachtin 0.03 EC @ 8 g a.i ha-1, Dinotefuran 20 SG@ 40 g a.i ha-1 and untreated control. All the treated plots recorded significantly lower percent of dead heart, white ear- head caused by stem borer and silver shoot caused by gall midge. Module with Pymetrozine 50 WG @ 150 g a.i ha-1 treated plot recorded significantly higher per cent reduction of plant hoppers (>80% over untreated control) and produced higher grain yield (50.75 qha-1) than the other modules. Among the different treated modules the maximum number of spiders was found in Azadirachtin 0.03 EC @ 8 g a.i ha-1 treated module plot followed by other treatments.

Correlation Studies on Grain Yield and its Component Traits in Rice (Oryza sativa L.)

2012 ◽  
Vol 2 (11) ◽  
pp. 13-14
Author(s):  
R. ARULMOZHI R. ARULMOZHI ◽  
◽  
Dr. A. MUTHUSWAMY Dr. A. MUTHUSWAMY
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Correlation Studies ◽  
Component Traits
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